# ESLint vs mypy

**Leader by Vioscale score:** mypy

| Attribute | ESLint | mypy |
|---|---|---|
| **Vioscale score** | 72.1 (44% (low)) | 80.4 (22% (low)) |
| activity.commits_last_30d | 92 | 44 |
| adoption.github_stars | 27,432 | 20,558 |
| adoption.package_downloads_weekly | 152,976,775 | 48,604,416 |
| deployment.options | `{"self_hosted":true}` | - |
| description.long | ESLint is an open source pluggable linting utility for JavaScript and JSX that statically analyzes code to find problems. Many issues can be automatically fixed, and it integrates with text editors and CI pipelines. | Mypy is an optional static type checker for Python that combines the benefits of dynamic and static typing. It enables compile-time type checking with no runtime overhead while allowing gradual migration from dynamic to static typing. |
| features.capabilities | `{"autofix":true,"function":"linter","ci_gating":true,"deployment":"cli_local","open_source":"oss","config_model":"config_file","custom_rules":true,"impl_language":"JavaScript","pricing_model":"free","language_scope":"single_language","editor_integration":true}` | `{"function":"type_checker","deployment":"cli_local","open_source":"oss","pricing_model":"free","language_scope":"single_language"}` |
| integrations.count | 1 | - |
| integrations.list | `[{"name":"Codemod"}]` | - |
| language.primary | JavaScript | Python |
| license.spdx | MIT | - |
| platform.support | `{"cli":true}` | - |
| pricing | `{"type":"open_source","plans":[{"free":true,"name":"Open Source","features":["Find issues in JavaScript code","Automatically fix problems","Custom parsers","Custom rules","Text editor integration","CI pipeline integration"],"description":"Free open source linter","contactSales":false}],"summary":"Free open source","freeTier":true,"sourceUrl":"https://eslint.org","retrievedAt":"2026-08-05T14:08:29.561Z"}` | `{"type":"open_source","sourceUrl":"https://mypy-lang.org","retrievedAt":"2026-08-05T14:11:24.368Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| release.cadence_days | 13 | - |

## Capabilities (Code Quality Tools)

| Capability | ESLint | mypy |
|---|:--:|:--:|
| **Core** |  |  |
| Function | Linter | Type checker |
| Language scope | Single-language | Single-language |
| Implementation language | JavaScript | - |
| **Capability** |  |  |
| Autofix | ✓ | - |
| **Config** |  |  |
| Config model | Config file | - |
| **Extensibility** |  |  |
| Custom rules | ✓ | - |
| **Deployment** |  |  |
| Deployment | CLI-local | CLI-local |
| **Delivery** |  |  |
| Editor integration | ✓ | - |
| CI / VCS gating | ✓ | - |
| **Insight** |  |  |
| Code metrics | - | - |
| **Performance** |  |  |
| Incremental / monorepo aware | - | - |
| **Licensing** |  |  |
| Open-source | OSS | OSS |
| **Commercial** |  |  |
| Pricing model | Free | Free |

*Source: Vioscale. Generated 2026-08-07T00:01:43.010Z. "-" = undocumented, not absent.*